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STRUCT USB_HOST_ENDP(9) Host-Side Data Types and Macro STRUCT USB_HOST_ENDP(9)

NAME

struct_usb_host_endpoint - host-side endpoint descriptor and queue

SYNOPSIS

struct usb_host_endpoint {
  struct usb_endpoint_descriptor desc;
  struct usb_ss_ep_comp_descriptor ss_ep_comp;
  struct usb_ssp_isoc_ep_comp_descriptor ssp_isoc_ep_comp;
  struct list_head urb_list;
  void * hcpriv;
  struct ep_device * ep_dev;
  unsigned char * extra;
  int extralen;
  int enabled;
  int streams;
};

MEMBERS

desc
descriptor for this endpoint, wMaxPacketSize in native byteorder
ss_ep_comp
SuperSpeed companion descriptor for this endpoint
ssp_isoc_ep_comp
SuperSpeedPlus isoc companion descriptor for this endpoint
urb_list
urbs queued to this endpoint; maintained by usbcore
hcpriv
for use by HCD; typically holds hardware dma queue head (QH) with one or more transfer descriptors (TDs) per urb
ep_dev
ep_device for sysfs info
extra
descriptors following this endpoint in the configuration
extralen
how many bytes of “extra” are valid
enabled
URBs may be submitted to this endpoint
streams
number of USB-3 streams allocated on the endpoint

DESCRIPTION

USB requests are always queued to a given endpoint, identified by a descriptor within an active interface in a given USB configuration.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.